C - Chemistry – Metallurgy – 08 – F
Patent
C - Chemistry, Metallurgy
08
F
402/626, 252/52.
C08F 4/64 (2006.01) C08F 4/02 (2006.01) C08F 10/00 (2006.01)
Patent
CA 1081200
ABSTRACT OF THE DISCLOSURE A process is provided for preparing polyolefins. The process includes the step of effecting a polymerization or copolymerization of olefins in the presence of a catalyst comprising a titanium-containing solid and an organometallic compound of a metal of Groups I to IV of the Periodic Table, the titanium-containing solid consisting of a reaction pro- duct obtained by copulverizing (1) at least one of a magnesium halide and a manganese halide, (2) an organohalide selected from the group consisting of aliphatic and alicyclic hydrocarbons having 1 to 20 carbon atoms and containing at least one halogen substituent, and aromatic hydrocarbons having 6 to 20 carbon atoms and containing at least one halogen substituent, and (3) at least one of a tetravalent and a trivalent titanium compound; the weight ratio of the at least one of magnesium halide and manganese halide to the organohalide being in the range of from 1:0.5 to 1:0.01; and the titanium content in the resulting solid in the range of from 0.5 to 10% by weight. In such process, the yield of polymer per solid and that per transition metal are remarkably increased and a polymer having a high bulk density is obtained in high yield, resulting in the step of removing the residual catalyst becoming unnecessary.
262551
Itoh Akio
Kuroda Nobuyuki
Matsuura Kazuo
Miyoshi Mituji
Shiraishi Takeichi
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